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Electron micrographs of unenveloped capsids (arrowheads) in growth cones and varicosities of human DRG axons infected with US9 deletion (US9− and F-US9/GFP), US9 repair (US9R and FUS9/GFP-R), KOS, and F strain viruses. Coverslips with explanted human fetal DRG in situ were HSV-1 infected, fixed at 24 hpi, and processed for TEM. The arrow in the F-US9/GFP-R micrograph indicates an extracellular virus. Bars, 200 nm.
